2 v. (488 p., variously numbered) : 19 cm

Vol. one is bound, has separately numbered parts on, e.g., motion, gravity, air, and sound ; most sections conclude with folded engravings signed : C.H. Becker : Ex Lov. ; and illustrations. The date 1774 appears on three title pages. Vol. two, titled Quaestiones Calefactoris (i.e., topics for the eager), is unbound with separately numbered sections on motion, mechanics, gravity, spheres, hydrostatics, etc. Leaves are various sizes, folded to 19 x 12 cm. ; in Latin

Provenance: Bern Dibner (donor)

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